Palo Alto Networks NGFW does not respond to ping from HPE Procurve/Aruba switches

Another unexpected Zone Protection Profile doing it’s thing – in this case sending a ping from an end-user device (such as Windows/macOS computer) to an IP interface (gateway) on a Palo Alto Networks Next Generation Firewall was coming back with a response, but requests from HPE ProCurve (Aruba) switches (2920/2530) appeared to disappear into oblivion with no response. A little… Read more



From around the web, Tuesday 9th July 2019

In this new blog post series I’ll be looking at (normally a selection of 3) cool articles, news and other blog posts that I find interesting during the day. For this week we have PowerShell tricks, a detailed article on securing the Windows Firewall and an (old but very interesting) write up on the woes of network administrators when everything… Read more



Server 2019 Network Policy Server (NPS) doesn’t reply to RADIUS requests

Bit of a crazy issue when deploying a new Ruckus wireless network – in first suspecting an issue with the controller software or perhaps some kind of access control list blocking traffic it turns out that the default Windows Firewall rule for allowing NPS traffic is broken in some fashion. Having tried this (and it working fine) on Windows Server… Read more



Restarting a Palo Alto Firewall for the first time – how long does it take?

As part of my new job I’ve taken on the management of a Palo Alto PA-3020, on my list of things to do…update the software/firmware on it. The update process its self is pretty simple in that you identify the version you are going to update to, download it, install it and then reboot the firewall at a time that… Read more